<template>
  <Layout>
    <div class="navBar">
      <Icon class="leftIcon" name="left" @click="goBack"/>
      <span class="title">编辑标签</span>
      <span class="rightIcon"></span>
    </div>
    <div class="form-wrapper">
      <FormItem :value="currentTag.name"
                @update:value="updateTag"
                field-name="标签名" placeholder="请输入标签名"/>
    </div>
    <div class="button-wrapper">
      <Button @click="removeTag">删除标签</Button>
    </div>
  </Layout>
</template>

<script lang="ts">
import Vue from 'vue'
import {Component} from "vue-property-decorator";
import FormItem from "@/components/Money/FormItem.vue";
import Button from "@/components/Button.vue";
// Component 可以将下列代码转化为vue组件,目前vue-property-decorator好用
@Component({
  components: {Button, FormItem},
})
export default class EditLabel extends Vue {
  get currentTag() {
    return this.$store.state.currentTag
  }
  created() {
    const id = this.$route.params.id
    this.$store.commit('fetchTags')
    this.$store.commit('setCurrentTag', id)
    if (!this.currentTag) {
      // $router用于转发，这里不能用push（若用户后退到之前的错误路径，又被跳转到404）
      this.$router.replace('/404')
    }
  }


  updateTag(name: string) {
    if (this.currentTag) {
      this.$store.commit('updateTag', {
        id: this.currentTag.id, name
      })
    }
  }

  removeTag() {
    if (this.currentTag) {
      this.$store.commit('removeTag',this.currentTag.id)
      this.$router.back()
    }
  }

  goBack() {
    this.$router.back()
  }
}
</script>

<style lang="scss" scoped>
.navBar {
  text-align: center;
  font-size: 16px;
  padding: 12px 16px;
  background: white;
  display: flex;
  align-items: center;
  justify-content: space-between;

  > .title {
  }

  > .leftIcon {
    width: 24px;
    height: 24px;
  }

  > .rightIcon {
    width: 24px;
    height: 24px;
  }
}

.form-wrapper {
  background: white;
  margin-top: 8px;
}

.button-wrapper {
  text-align: center;
  padding: 16px;
  margin-top: 44-16px;
}
</style>